#315AB4
Closest named color: Mid Blue (#276AB3). oklch(48.9% 0.15 263.4), rgb(49, 90, 180).
Aa
White text reads best on this color (6.45:1).
About this color
#315AB4 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.150 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.043 away. White text reads best on it, at 6.45:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.25:1 |
| White text | 6.45:1 |
Values
| HEX | #315AB4 |
| RGB | rgb(49, 90, 180) |
| HSL | hsl(221, 57%, 45%) |
| OKLCH | oklch(48.9% 0.15 263.4) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #315AB4 | 6.45:1 | AA | Lc -86.8 | Fine for body text |
| Black text on #315AB4 | 3.25:1 | AA large text | Lc 22.4 | Dividers and decoration only |
| #315AB4 text on white | 6.45:1 | AA | Lc 81.7 | Fine for body text |
| #315AB4 text on black | 3.25:1 | AA large text | Lc -20.2 | Dividers and decoration only |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 700.
-
Step 50
50
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A8C1F1
oklch(80.9% 0.074 263.3)
-
Step 400
400
#7A9FE9
oklch(70.6% 0.117 263.4)
-
Step 500
500
#5986E3
oklch(63.2% 0.149 263.3)
-
Step 600
600
#3F6DD1
oklch(55.6% 0.163 263.5)
-
Step 700
700 (this color)
#315AB4
oklch(48.9% 0.15 263.4)
-
Step 800
800
#2A4B92
oklch(42.8% 0.123 263.4)
-
Step 900
900
#263F75
oklch(37.8% 0.097 263.7)
-
Step 950
950
#162544
oklch(26.9% 0.061 263.4)
#315AB4 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #2565B7 | 0.029 |
| Deuteranopia (no green cones) | #0059B2 | 0.028 |
| Tritanopia (no blue cones) | #006F7E | 0.120 |
| Achromatopsia (no color) | #5E5E5E | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #315AB4
#315AB4
oklch(48.9% 0.15 263.4)
- #7B5A00
#7B5A00
oklch(48.9% 0.1 83.7)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #315AB4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.043
- French Blue #436BAD ΔE 0.056
- Denim Blue #3B5B92 ΔE 0.056
- Dusky Blue #475F94 ΔE 0.060
- Dusk Blue #26538D ΔE 0.066
- Iris #6258C4 ΔE 0.068
- Warm Blue #4B57DB ΔE 0.069
- Blue Blue #2242C7 ΔE 0.069
Use #315AB4 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.